I'm not getting into the hate speech debate - most of this page of comments so far is depressingly tone-deaf and insensitive - but I have to say that your argument about having no rights on websites is pretty hollow. Nobody with even a modicum of sense ever claims that their actual legal rights are being violated when they complain about being censored on a private website. Any reference to "free speech" is an appeal to shared values, an argument that they think the moderators are acting improperly in light of those shared values. The public debate is over whether platforms like Facebook, Google, Reddit, etc should be neutral marketplaces of ideas, like Greek agora, and to what extent they should be able to privately police such a large part of our public discourse. This is a legitimate topic for debate and potential public policy, even if initially such policy would only serve to provide a voice for some pretty despicable people. You pointing out that Facebook is a private company which can do whatever it wants with its own data is wholly missing the point. Nobody is even having that conversation.

Are they platforms or publishers? Your ISP doesn't police content in a meaningful way and are immune to legal claims that their service is responsible for same, similarly a newspaper is legally responsible for what it prints due to the fact they have a editor who controls what is published.

Twitter et al. seem to want to have it both ways.